Cargando…
Genetic Diversity and Recombination in the Plant Pathogen Sclerotinia sclerotiorum Detected in Sri Lanka
Sclerotinia sclerotiorum is an important fungal pathogen on many economically important crops including cabbage worldwide. Even though population structure and genetic diversity of S. sclerotiorum is well studied in temperate climatic conditions, only a few studies have been conducted in tropical co...
Autores principales: | , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7238271/ https://www.ncbi.nlm.nih.gov/pubmed/32331222 http://dx.doi.org/10.3390/pathogens9040306 |
_version_ | 1783536507678621696 |
---|---|
author | Mahalingam, Thirega Chen, Weidong Rajapakse, Chandima Shashikala Somachandra, Kandangamuwa Pathirannahalage Attanayake, Renuka Nilmini |
author_facet | Mahalingam, Thirega Chen, Weidong Rajapakse, Chandima Shashikala Somachandra, Kandangamuwa Pathirannahalage Attanayake, Renuka Nilmini |
author_sort | Mahalingam, Thirega |
collection | PubMed |
description | Sclerotinia sclerotiorum is an important fungal pathogen on many economically important crops including cabbage worldwide. Even though population structure and genetic diversity of S. sclerotiorum is well studied in temperate climatic conditions, only a few studies have been conducted in tropical countries. It is also not clear whether the populations are clonal or recombining in the tropics. In filling this information gap, 47 isolates of S. sclerotiorum were collected from commercial cabbage (Brassica oleracea L.) fields in Nuwara Eliya district of Sri Lanka, where the disease has been previously reported. All the isolates were subjected to genetic diversity study using mycelial compatibility grouping and microsatellite markers. Fourteen mycelial compatibility groups (MCGs) and 23 multilocus haplotypes (MLHs) were recorded. Mean expected heterozygosity of the population was 0.56. MLHs were weakly correlated with MCGs. Population genetic structure analysis and principal coordinates identified three genetic clusters. Genetic recombination was inferred within each genetic cluster when isolates were subjected to clone correction. There was evidence of multiple infections on single plant as detected by the presence of more than one MCG on each cabbage plant. However, multiple infections did not increase the disease severity in detached leaf assay. We found high genetic diversity and recombination of S. sclerotiorum population in a tropical country, Sri Lanka. Importance of detecting genetic structure when inferring recombination was also highlighted. |
format | Online Article Text |
id | pubmed-7238271 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-72382712020-06-02 Genetic Diversity and Recombination in the Plant Pathogen Sclerotinia sclerotiorum Detected in Sri Lanka Mahalingam, Thirega Chen, Weidong Rajapakse, Chandima Shashikala Somachandra, Kandangamuwa Pathirannahalage Attanayake, Renuka Nilmini Pathogens Article Sclerotinia sclerotiorum is an important fungal pathogen on many economically important crops including cabbage worldwide. Even though population structure and genetic diversity of S. sclerotiorum is well studied in temperate climatic conditions, only a few studies have been conducted in tropical countries. It is also not clear whether the populations are clonal or recombining in the tropics. In filling this information gap, 47 isolates of S. sclerotiorum were collected from commercial cabbage (Brassica oleracea L.) fields in Nuwara Eliya district of Sri Lanka, where the disease has been previously reported. All the isolates were subjected to genetic diversity study using mycelial compatibility grouping and microsatellite markers. Fourteen mycelial compatibility groups (MCGs) and 23 multilocus haplotypes (MLHs) were recorded. Mean expected heterozygosity of the population was 0.56. MLHs were weakly correlated with MCGs. Population genetic structure analysis and principal coordinates identified three genetic clusters. Genetic recombination was inferred within each genetic cluster when isolates were subjected to clone correction. There was evidence of multiple infections on single plant as detected by the presence of more than one MCG on each cabbage plant. However, multiple infections did not increase the disease severity in detached leaf assay. We found high genetic diversity and recombination of S. sclerotiorum population in a tropical country, Sri Lanka. Importance of detecting genetic structure when inferring recombination was also highlighted. MDPI 2020-04-22 /pmc/articles/PMC7238271/ /pubmed/32331222 http://dx.doi.org/10.3390/pathogens9040306 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Mahalingam, Thirega Chen, Weidong Rajapakse, Chandima Shashikala Somachandra, Kandangamuwa Pathirannahalage Attanayake, Renuka Nilmini Genetic Diversity and Recombination in the Plant Pathogen Sclerotinia sclerotiorum Detected in Sri Lanka |
title | Genetic Diversity and Recombination in the Plant Pathogen Sclerotinia sclerotiorum Detected in Sri Lanka |
title_full | Genetic Diversity and Recombination in the Plant Pathogen Sclerotinia sclerotiorum Detected in Sri Lanka |
title_fullStr | Genetic Diversity and Recombination in the Plant Pathogen Sclerotinia sclerotiorum Detected in Sri Lanka |
title_full_unstemmed | Genetic Diversity and Recombination in the Plant Pathogen Sclerotinia sclerotiorum Detected in Sri Lanka |
title_short | Genetic Diversity and Recombination in the Plant Pathogen Sclerotinia sclerotiorum Detected in Sri Lanka |
title_sort | genetic diversity and recombination in the plant pathogen sclerotinia sclerotiorum detected in sri lanka |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7238271/ https://www.ncbi.nlm.nih.gov/pubmed/32331222 http://dx.doi.org/10.3390/pathogens9040306 |
work_keys_str_mv | AT mahalingamthirega geneticdiversityandrecombinationintheplantpathogensclerotiniasclerotiorumdetectedinsrilanka AT chenweidong geneticdiversityandrecombinationintheplantpathogensclerotiniasclerotiorumdetectedinsrilanka AT rajapaksechandimashashikala geneticdiversityandrecombinationintheplantpathogensclerotiniasclerotiorumdetectedinsrilanka AT somachandrakandangamuwapathirannahalage geneticdiversityandrecombinationintheplantpathogensclerotiniasclerotiorumdetectedinsrilanka AT attanayakerenukanilmini geneticdiversityandrecombinationintheplantpathogensclerotiniasclerotiorumdetectedinsrilanka |